| Summary: | Sheard, J. W., Lendemer, J. C., Spribille, T., Thor, G. & Tønsberg, T. 2012. Further contributions to the genus Rinodina (Physciaceae, Lecanoromycetidae): two species new to science and a new record for the Canadian High Arctic. — Herzogia 25: 125–143.Two species of Rinodina are described as new to science (R. buckii and R. bullata) and a third is reported for the first time from arctic Canada (R. ochracea). Rinodina buckii, a sorediate species that resembles R. willeyi is described from disjunct localities in East Asia and the Appalachian Mountains of eastern North America. Rinodina bullata, a species with a peculiar minutely areolate thallus that is frequently sterile, is described from the central Appalachian Mountains of eastern North America. Rinodina ochracea, originally described from Greenland, is reported from the Northwest Territories in Canada. The newly described species are illustrated with both colour light micrographs (CLMs) and scanning electron micrographs (SEMs), and maps of their geographic distributions are presented. CLMs and SEMs of R. excrescens and R. willeyi are also provided for comparison.
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